Final answer:
The family's average rate of spending in dollars per hour from 2:00 pm to 5:00 pm is $40.
Step-by-step explanation:
To calculate the average rate of spending in dollars per hour from 2:00 pm to 5:00 pm, we need to find the total amount spent during that time period and divide it by the number of hours.
- From 1:00 pm to 2:00 pm, the family spent $60.
- From 2:00 pm to 5:00 pm, the family spent $180 - $60 = $120.
- The time period from 2:00 pm to 5:00 pm is 3 hours.
- The average rate of spending per hour is $120 / 3 = $40 per hour.
Therefore, the family's average rate of spending in dollars per hour from 2:00 pm to 5:00 pm is $40.